DAYS 1-5 (JULY 18-22)
Today is transition day as a slow-moving cold front moves across the region then comes to a stop off the South Coast tonight. We’ll be under a cloud canopy for a while with a few scattered showers around during this morning and midday as the front traverses the region. Lower dew point air slowly works in from northwest to southeast, so this is not a quick air mass change but a slower transition. But by this evening and tonight, you’ll notice it being much drier than it has been for the past several days, and this will last through most of the weekend, with only a slight increase in humidity again (not to really uncomfortable levels) during Sunday and a little more notable increase by Monday. This will take place as a high pressure area that comes in for the end of this week slides offshore by the end of the weekend and early next week. Additionally, a swath of mid and upper level moisture will provide more cloudiness than previously forecast on Saturday, so there will be limited sun that day. A weak cold front drops down from northern New England Sunday but again only the slightest chance of a shower exists in northern portions of the WHW forecast area. What’s left of this boundary sits over southern New England Monday and may help initiate a few showers near the South Coast.
TODAY: Lots of clouds including a few scattered showers through midday. Increasing sun thereafter. Highs 80-87. Dew point falling into / through 60s from northwest to southeast. Wind variable becoming NW 5-15 MPH.
TONIGHT: Mostly clear except patchy ground fog interior lower elevations. Lows 58-65, warmest urban areas. Dew point upper 50 to lower 60s. Wind NW under 10 MPH.
FRIDAY: Sunny – few fair weather clouds. Highs 78-85, coolest at the coast. Dew point upper 50s. Wind variable up to 10 MPH with coastal sea breezes.
FRIDAY NIGHT: Mostly clear. Patchy interior lower elevation ground fog develops. Lows 57-64. Dew point middle to upper 50s. Wind variable under 10 MPH.
SATURDAY: Partly sunny. Highs 79-86, coolest coast. Dew point upper 50s. Wind variable up to 10 MPH with coastal sea breezes.
SATURDAY NIGHT: Partly cloudy. Lows 60-67. Dew point upper 50s. Wind SW up to 10 MPH.
SUNDAY: Sunny to partly cloudy. Maybe an evening shower reaches southern NH. Highs 82-89. Dew point lower 60s. Wind SW 5-15 MPH.
SUNDAY NIGHT: Partly cloudy. Lows 61-68. Dew point lower 60s. Wind variable up to 10 MPH.
MONDAY: Partly sunny. A few showers possible South Coast. Highs 79-86, coolest coast. Dew point lower 60s. Wind variable to E up to 10 MPH.
DAYS 6-10 (JULY 23-27)
Higher humidity and shower chances in the July 23-26 period before drier air returns as the end of the period. No prolonged major heat expected.
DAYS 11-15 (JULY 28 – AUGUST 1)
A push of drier air early period then humidity returns again with a few showers / storms possible. No prolonged major heat indicated at this time.